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Memory Upgrade Frequently Asked Questions (FAQ) - Technical Questions and Answers

 

Here you may find an extract of the most frequently asked questions of our customers:

 

T1.Are the offered memory upgrades really absolutely compatible to my system?

T2.Do your upgrades have the same quality as original upgrades of my system manufacturer?

T3.Which products can I obtain from CompuRAM?

T4.Shall I order memory upgrades with or without ECC (= non ECC)?

T5.Do problems have to be expected when installing 3rd-party-memory in PRIMERGY-servers by Fujitsu(-Siemens)?

T6.4 GB or more system memory is installed, but the operating system shows less usable memory capacity?

T7.Why should I update my BIOS version before installing additional memory?

T8.How can I find out, if my memory has been properly integrated in the BIOS of my system?

T9.How can I find out the exact indication of my system; how it is currently equipped and how much it can be upgraded to?

T10.Can compatible CompuRAM modules be installed additionally to the original modules in one system?

T11.CompuRAM offers upgrades with identical capacity but with different clock speeds. How do I determine which one is the matching upgrade for me?

T12..It often happens that the maximum upgradeability is announced higher in the CompuRAM product database than in the original manufacturers statement.

T13.How much RAM can be addressed to a Windows 32-bit and 64- bit operating system?

T14.My question is not answered here - where can I find more FAQ?

 
   
   
   
   
   
   
   
   

          

 

 

T1.

Are the offered memory upgrades really absolutely compatible to my system?

  
  We make sure that our memory upgrades are absolutely compatible to the particular systems resp. to the particular customer specifications.

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T2.

Do your upgrades have the same quality as original upgrades of my system manufacturer?

  
  Our modules origin from the same manufacturers as the so called original memory upgrades and also correspond 100% to the same industry standards as JEDEC, INTEL and/or neccessary individual designs. We stay in worldwide contact to these manufacturers to guaranty quality.

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T3.

Which products can I obtain from CompuRAM?

  
 

The CompuRAM product portfolio ranges from memory upgrades for workstations, mainboards, servers, PCs, printers and notebooks to modules according to industry standards.

CompuRAM provides about 4.000 memory components for all computer systems of well-known manufacturers, as well as solutions for special and old devices.

Due to our sole specialisation on memory upgrades and our long term experience and best contacts to memory and system manufacturers we can offer our customers high-quality and absolutely compatible products to very reasonable conditions and in as short as possible delivery times.

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T4.

Shall I order memory upgrades with or without ECC (= non ECC)?

  
  Firstly it should be verified that your computer system supports ECC; this information is mostly to be found in the manual of your device.
Should your device support ECC, the installation of ECC memory modules is being recommended, if the computer is used e.g. as a server and therefore an enhanced system stability and data integrity is requested.

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T5.

Do problems have to be expected when installing 3rd-party-memory in PRIMERGY-servers by Fujitsu(-Siemens)?

  
  Please read our current statement: (57 KB)

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T6.

4 GB or more system memory is installed, but the operating system shows less usable memory capacity?

  
 

Basically, for the usage of more than 4GB memory a 64-bit operating system is neccessary.
Due to PC architectural requirements such as motherboard resources and OS limitations, platforms using larger memory may be unable to take full advantage of all memory populated on the system.

When systems with chipsets, that support 4GB or more of system memory, are populated with 4GB or more, the Operating System (OS) may report a lower amount of available memory. Standard PC Architecture System Resources require addressing which overlaps physical memory below 4GB:


  • System BIOS
  • Motherboard Resources (I/OxAPIC)
  • Memory Mapped I/O
  • PCI Express Configuration Space
  • Additional PCI Device Memory (Graphics Aperture)
  • VGA Memory
  • Others as included, etc..

These requirements may reduce the addressable memory space available to and reported by the Operating System. These memory ranges, while unavailable to the OS, are still being utilized by subsystems such as I/O, PCI Express and Integrated Graphics and are critical to the proper functioning of the PC.

x86 chipsets that support more than 4 GB of RAM typically also support memory remapping (referred to in some BIOS setup screens as "memory hole remapping").
In this scheme, the BIOS detects the memory address conflict and in effect relocates the interfering RAM so that it may be addressed by the processor at a new physical address that does not conflict with MMIO.
On the Intel side, this support once was limited to server chipsets; however, newer desktop chipsets like the Intel 955X and 965 and later support it as well. On the AMD side, the AMD K8 and later processors built-in memory controller supported it from the beginning.

 

Please find detailed explanations about this topic from the view of Microsoft here:

http://support.microsoft.com/kb/929605/de

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T7.

Why should I update my BIOS version before installing additional memory?

  
  The BIOS (Basic Input Output System) is basically the control center of your system. All important information, settings and control functions of your system are saved in the BIOS.

It is absolutely neccessary for a properly running system to always have the latest BIOS version installed. In general, all system manufacturers offer the latest BIOS versions for downloading on their websites. (Please also read your manual for more information.)

Because the control functions in the BIOS also contain parameters as e.g. timing and memory (RAM)- settings, it is important to make sure that the latest BIOS version is installed when installing additional memory.

Thus a BIOS-update is the first solution when problems occur with new or additional components. This is also applicable for original memory modules as well as for our CompuRAM upgrades.

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T8.

How can I find out, if my memory has been properly integrated in the BIOS of my system?

  
 

You can use the Windows Memory Diagnostic Tool by Microsoft to test if the memory, independent from the particularly installed operating system, has been integrated properly into the system by the BIOS:

  • When errors occur during the tests, the first step is to make sure that the memory has been integrated by the BIOS into the system at all.
  • When no errors occur during the tests, that means the memory is being tested as O.K., the error can be assumed to lie in the installation/configuration of the operating system.

You may download the Windows Memory Diagnostic Tool and the correspondent instructions directly from the Microsoft homepage:

 

http://windows.microsoft.com/en-gb/windows7/diagnosing-memory-problems-on-your-computer

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T9.

How can I find out the exact indication of my system; how it is currently equipped and how much it can be upgraded to?

  
 

For Windows:

Manual for computers with Windows operating system

For Apple:

  • With the serial number of your Apple you can access your model data here.
    http://support.apple.com/specs/
  • If you are using MAC OS X you may read out the exact system data with the System Profiler.
    System Profiler -> "About this Mac" -> "More information"

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T10.

Can compatible CompuRAM modules be installed additionally to the original modules in one system?

  
  Yes, compatible CompuRAM modules as well as original modules can be installed together in one system, because both correspond to the same specifications of JEDEC etc..

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T11.

CompuRAM offers upgrades with identical capacity but with different clock speeds. How do I determine which one is the matching upgrade for me?

  
 

Basically you can rely on the fact that all upgrades we matched to certain system models are compatible and mixable. If system upgrades are subject to special specifications we will mention it seperately.

The best option is to buy the upgrade with the highest clock speed, especially because prices often differ slightly.
For example 400MHz instead of 333MHz or 1333MHz instead of 1066MHz etc.

Our clock speed indication always refers to the memory modules MAXIMUM possible operation modes.

Despite the still common opinion, DIMM or SO-DIMM do not have an own clock speed but are alwaysbeing clocked by the system bus..

The maximum, but especially the minimum, memory clock speed is predefined by the memory s possibilities, the chipset, the CPU and often the systems manufacturer. The clock speed justifies itself during the booting process by BIOS routines to maximum possible and secure values.

Conclusion:

  • The slowest memory module always determines the clock speed for all RAM installed in the system.
  • Thus you can mix different "fast" modules carelessly, if we offer them.
  • Your system is justifying itself during the booting process to ideal, stable and secure values.
  • he indication on the modules resp. in the article description refers to the maximum timing values. These values are standardised according to JEDEC and INTEL worldwide.For these standards a different wording is being used. For example: The indications DDR400, PC3200 or 400MHz are basically all the same specifications.
  • For our upgrades, we always use the most current and fastest DRAMs and never old items. That means, that we are tendentially provide upgrades that allow an even higher timing than neccessary for your system.

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T12.

.It often happens that the maximum upgradeability is announced higher in the CompuRAM product database than in the original manufacturers statement.

  
  Our database content is constantly being updated and stays current with each memory manufacturers compatibility specification for each supported computer manufacturer. New DRAM technologies, memory modules, BIOS- or softwarepatches often allow a higher upgradeability without limitation but with the same performance and stability as originally announced. Most system manufacturers do not update their existing documentation to inform users of memory enhancements to older systems. CompuRAM keeps you current with new memory options.

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T13.

How much RAM can be addressed to a Windows 32-bit and 64- bit operating system?

  
 

Basically, for the usage of 4GB or more memory a 64-bit operating system is neccessary. Here you find an overview of maximum memory of the MS Windows operating systems

 

Operating System Maximum Memory (RAM)
Mac OS X 96GB
Windows RT 32-bit 4GB
Windows 8 32-bit 4GB
Windows 8 Pro 32-bit 4GB
Windows 8 Enterprise 32-bit 4GB
Windows 8 64-bit 192GB
Windows 8 Pro 64-bit 512GB
Windows 8 Enterprise 64-bit 512GB
Windows 7 Starter 32-bit 4GB
Windows 7 Starter 64-bit 8GB
Windows 7 Home Basic 32-bit 4GB
Windows 7 Home Basic 64-bit 8GB
Windows 7 Home Premium 32-bit 4GB
Windows 7 Home Premium 64-bit 16GB
Windows 7 Professional 32-bit 4GB
Windows 7 Professional 64-bit 192GB
Windows 7 Enterprise 32-bit 4GB
Windows 7 Enterprise 64-bit 192
Windows 7 Ultimate 32-bit 4GB
Windows 7 Ultimate 64-bit 192GB
Windows Vista Home Basic 32-bit 4GB
Windows Vista Home Basic 64-bit 8GB
Windows Vista Home Premium 32-bit 4GB
Windows Vista Home Premium 64-bit 16GB
Windows Vista Business 32-bit 4GB
Windows Vista Business 64-bit 192GB
Windows Vista Ultimate 32-bit 4GB
Windows Vista Ultimate 64-bit 192GB
Windows Vista Enterprise 32-bit 4GB
Windows Vista Enterprise 64-bit 192GB
Windows XP Home 32-bit 4GB
Windows XP Professional 32-bit 4GB
Windows XP Professional 64-bit 128GB
Windows 2003 Server Standart Edition 32-bit 4GB
Windows 2003 Server Standart Edition 64-bit 32GB
Windows 2003 Server Enterprise Edition 32-bit 64GB
Windows 2003 Server Enterprise Edition 64-bit 1TB
Windows 2003 Server Datacenter Edition 32-bit 128GB
Windows 2003 Server Datacenter Edition 64-bit 1TB
Windows 2008 Server Web 32-bit 4GB
Windows 2008 Server Web 64-bit 32GB
Windows 2008 Server Standard 32-bit 4GB
Windows 2008 Server Standard 64-bit 32GB
Windows 2008 Server Enterprise 32-bit 64GB
Windows 2008 Server Enterprise 64-bit 2TB
Windows 2008 Server Datacenter 32-bit 64GB
Windows 2008 Server Datacenter 64-bit 2TB
Windows 2008 R2 Server Web 64-bit 32GB
Windows 2008 R2 Server Foundation 64-bit 8GB
Windows 2008 R2 Server Standard 64-bit 32GB
Windows 2008 R2 Server Enterprise 64-bit 2TB
Windows 2008 R2 Server Datacenter 64-bit 2TB
Windows 2008 R2 Server Itanium 64-bit 2TB
Windows Server 2012 Foundation 32GB
Windows Server 2012 Essentials 64GB
Windows Server 2012 Standard 4TB
Windows Server 2012 Datacenter 4TB

 

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T14.

My question is not answered here - where can I find more FAQ?

  
  Please visit our support portal

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